spring中JdbcTemplate使用

1、maven依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.ly.spring</groupId>
    <artifactId>spring06</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.0.2.RELEASE</version>
        </dependency>
        <!--JdbcTemplate-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.0.2.RELEASE</version>
        </dependency>
        <!--事务-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.0.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>
        <!--整合junit-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.0.2.RELEASE</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <!--解决IDEA maven变更后自动重置LanguageLevel和JavaCompiler版本的问题-->
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <source>13</source>
                    <target>13</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

2、实体类

package com.ly.spring.domain;

import java.io.Serializable;

public class Account implements Serializable {
    private int id;
    private int uid;
    private double money;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public int getUid() {
        return uid;
    }

    public void setUid(int uid) {
        this.uid = uid;
    }

    public double getMoney() {
        return money;
    }

    public void setMoney(double money) {
        this.money = money;
    }

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", uid=" + uid +
                ", money=" + money +
                '}';
    }
}

 

3、dao接口

package com.ly.spring.dao;

import com.ly.spring.domain.Account;

import java.util.List;

public interface IAccountDao {
    public List<Account> findAll();
    public Account findOne(Integer id);
    public int saveAccount(Account account);
    public int updateAccount(Account account);
    public int deleteAccount(Integer id);
    public int findAccount();
}

 

4、dao实现类

package com.ly.spring.dao.impl;

import com.ly.spring.dao.IAccountDao;
import com.ly.spring.domain.Account;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.support.JdbcDaoSupport;
import org.springframework.stereotype.Repository;

import javax.sql.DataSource;
import java.util.List;

@Repository("accountDao")
public class AccountDaoImpl extends JdbcDaoSupport implements IAccountDao {
    //给JdbcDaoSupport注入DataSource
    @Autowired
    public AccountDaoImpl(DataSource dataSource) {
        super.setDataSource(dataSource);
    }

    @Override
    public List<Account> findAll() {
        return super.getJdbcTemplate().query("select * from account",new BeanPropertyRowMapper<Account>(Account.class));
    }

    @Override
    public Account findOne(Integer id) {
        return super.getJdbcTemplate().queryForObject("select * from account where id = ?",new BeanPropertyRowMapper<Account>(Account.class),6);
    }

    @Override
    public int saveAccount(Account account) {
        return super.getJdbcTemplate().update("insert into account(id,uid,money) values(?,?,?)",account.getId(),account.getUid(),account.getMoney());
    }

    @Override
    public int updateAccount(Account account) {
        return super.getJdbcTemplate().update("update account set money = ? where id = ?",account.getMoney(),account.getId());
    }

    @Override
    public int deleteAccount(Integer id) {
        return super.getJdbcTemplate().update("delete from account where id = ?",id);
    }

    @Override
    public int findAccount() {
        return super.getJdbcTemplate().queryForObject("select count(1) from account",Integer.class);
    }

}

 

5、jdbc配置文件

jdbc.driver = com.mysql.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/db01
jdbc.user = root
jdbc.password = root

6、spring配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
    <!--配置注解扫描包-->
    <context:component-scan base-package="com.ly.spring"></context:component-scan>
    <!--配置资源文件-->
    <context:property-placeholder location="classpath:db.properties"></context:property-placeholder>
    <!--配置数据源并注入相关属性-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${jdbc.driver}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.user}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
</beans>

7、测试类

package com.ly.spring.test;

import com.ly.spring.dao.IAccountDao;
import com.ly.spring.domain.Account;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.List;

//替换junit的main方法
@RunWith(SpringJUnit4ClassRunner.class)
//指定spring的配置文件的位置
@ContextConfiguration(locations = "classpath:bean.xml")
public class MainTest {
    @Autowired
    private IAccountDao accountDao;
    @Test
    public void testFindAll() {
        List<Account> accounts = accountDao.findAll();
        System.out.println(accounts);
        System.out.println("------");
    }
    @Test
    public void testFindOne() {
        Account account = accountDao.findOne(52);
        System.out.println(account);
    }

    @Test
    public void testSaveAccount() {
        Account account = new Account();
        account.setUid(51);
        account.setMoney(20000);
        accountDao.saveAccount(account);
    }

    @Test
    public void testUpdateAccount() {
        Account account = new Account();
        account.setId(7);
        account.setMoney(100000);
        accountDao.updateAccount(account);
    }
    @Test
    public void testDeleteAccount() {
        accountDao.deleteAccount(7);
    }

    @Test
    public void testFindAccount() {
        int count = accountDao.findAccount();
        System.out.println("count---"+count);
}
}